Really neat game! I went through 60 levels in a row. Definitely started seeing the same levels pop up. I feel like it'd benefit from a stage system (5-20 levels back to back in increasing difficulty) would be neat for a final version of this if you want to continue the concept. Maybe also some upgrades. I feel like the attack went on for way too long making it a bit easy. Maybe with limited uses (3 per level or something?) because I basically just used it in the beginning and that lasted me through the level usually.
Definitely the most fun I had! I hopped back in a few times just because I enjoyed playing it. Well done!
If you get the chance, I'd like to see what you think of my submission!